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doc: fix non-compiling examples #20

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Mar 22, 2025
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doc: fix non-compiling examples #20

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11 changes: 7 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -220,8 +220,8 @@ httpGet = do
JSON req <- input
-- Send the request, get a 'Response'
res <- sendRequest req (Nothing :: Maybe String)
-- Save response body to memory
outputMemory (memory res)
-- Save response body to output
output $ responseData res
-- Return code
return 0

Expand All @@ -243,6 +243,8 @@ to do this correctly. So we recommend reading out [concept doc on Host Functions
Host functions in the Haskell PDK require C stubs to import a function from a particular namespace:

```c
#include <stdint.h>

#define IMPORT(a, b) __attribute__((import_module(a), import_name(b)))
IMPORT("extism:host/user", "a_python_func")
uint64_t a_python_func_impl(uint64_t input);
Expand All @@ -265,8 +267,9 @@ foreign import ccall "a_python_func" aPythonFunc :: Word64 -> IO Word64
helloFromPython :: String -> IO String
helloFromPython = do
s' <- allocString "Hello!"
res <- aPythonFunc (memoryOffset s')
logInfo <$> loadString res
resOffset <- aPythonFunc (memoryOffset s')
resMem <- findMemory resOffset
logInfo =<< loadString resMem
return 0

foreign export ccall "helloFromPython" helloFromPython :: IO Int32
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